/**
 * Copyright (c) 2008, Piercarlo Slavazza
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * The name of Piercarlo Slavazza cannot be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Piercarlo Slavazza ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Piercarlo Slavazza BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.libapml.serializers;

import java.io.PrintStream;
import java.io.StringWriter;

import com.libapml.ApmlIndex;
import com.libapml.Concept;
import com.libapml.ConceptOccurrenceInDocument;
import com.libapml.util.Helper;

public class PrintStreamSerializer {

	private ApmlIndex index;
	
	public PrintStreamSerializer(ApmlIndex index) {
		
		Helper.checkNotNull(index);
		
		this.index = index;
	}

	public void serialize(PrintStream out) {
		
		Helper.checkNotNull(out);
		
		for (Concept concept : index.getSortedConcepts()) {
			out.println(
					concept.getTerm() + " " + 
					concept.getDocumentOccurrenciesCount() + " " +
					concept.getTotalOccurrenciesCount() + " " +
					concept.getTfidfMean());
			
			StringWriter sw = new StringWriter();
			sw.append("\t");
			for (ConceptOccurrenceInDocument occurrence : concept.getDocumentOccurrencies()) {
				sw.append(" " + occurrence.getFrequency());
			}
			
			out.println(sw.toString());
		}
		
	}
	
}
